Maureece Waata has been passing his time sitting in the bumper-to-bumper Auckland traffic by grabbing fellow motorists attention and telling them their keys are in their car door. While they're drving. So much doh.

The reactions are priceless and his video has already wracked up over half a million views.

Watch the video above.

"This is the only thing that makes sitting in Auckland traffic somewhat fun," said Maureece on his video's caption.